Doctor profile · Federal record
Dr. Michael Gnatt, MD
Internal Medicine Physician · Internal Medicine Physician · Rockville, MD
- NPI 1255392866
- 20 yrs on file
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
14955 Shady Grove RD, Suite 100
Rockville, MD 208508700
(301) 990-3193
fax (301) 990-3199 - Mailing address
-
3100 Wyman Park Dr
Baltimore, MD 212112803
Credentials & registration
- NPI registered
- March 2006 — 20 yrs on file
- Profile last updated
- May 9, 2013
- Specialty taxonomy
- 207R00000X — NUCC code
- State licenses (2)
- Maryland #D0066915 · New York #204857
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1255392866. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
702
Distinct HCPCS
9
Medicare allowed
$58,394
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 198 | 68 | $144 | |
36415 |
Insertion of needle into vein for collection of blood sample | 170 | 72 | $8 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 71 | 71 | $145 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 61 | 53 | $102 | |
G0444 |
Annual depression screening, 5 to 15 minutes | 60 | 60 | $21 | |
G0008 |
Administration of influenza virus vaccine | 49 | 49 | $29 | |
90662 |
Influenza vaccine split virus, preservative free | 48 | 48 | $72 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 28 | 20 | $200 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 17 | 11 | $17 |
In context: peer comparison
Among 50 peers in Rockville Internal Medicine Physician, average services per provider: 138. This provider delivers 5.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
575
Patients
75
Total drug cost
$83,219
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 89 | 24 | $1,665 |
| Amlodipine Besylate | Generic | 61 | 15 | $563 |
| Rosuvastatin Calcium | Generic | 56 | 14 | $1,764 |
| Levothyroxine Sodium | Generic | 49 | 0 | $854 |
| Losartan Potassium | Generic | 47 | 11 | $913 |
| Ozempic (Semaglutide) | Brand | 36 | 0 | $68,863 |
| Gabapentin | Generic | 31 | 11 | $914 |
| Metoprolol Succinate | Generic | 31 | 0 | $531 |
| Famotidine | Generic | 29 | 0 | $865 |
| Donepezil Hcl | Generic | 26 | 0 | $2,395 |
Frequently asked questions
What is Dr. Michael Gnatt's medical specialty?
Dr. Michael Gnatt practices Internal Medicine Physician in Rockville, MD.
Where does Dr. Michael Gnatt practice?
Dr. Michael Gnatt practices at 14955 Shady Grove RD, Rockville, MD 208508700. Office phone: 3019903193.
What is Dr. Michael Gnatt's NPI?
Dr. Michael Gnatt's National Provider Identifier (NPI) is 1255392866, issued by NPPES.
What procedures does Dr. Michael Gnatt commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Insertion of needle into vein for collection of blood sample (HCPCS 36415); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439). Source: CMS Medicare Physician & Other Practitioners file.